Hand-operated press



March 2,1926. 1,574,787

' W. H. BRECKNELL HAND- OPERATED PRESS Filed June 25, 1925 2 Sheets-Sheet 1 //VVENTOR.

March 2 1926. 1,574,787

/ w. H. BRECKNELL I HAND OPERATED PRES 5 Filed June 2 1925 2 Sheets-Sheet //VVENTOR. Wm, 1& W

Patented Mar. 2, 1926.

TE SJ'ITE v 1,574,787 PTENT QFFLC'EZ.

WILLIAM HENRY BRECKNELL, F WESTON-SUPEB-MARE, ENGLAND.

I HAND-OPERATED IBESS.

Application filed June 25, 1925. Serial No. 39,630.

To all. whom it may concern Be it known that 1, WILLIAM HENRY iinnermnml, a subject of the King of Great Britain and Ireland, residing at 2830 Meadow Street, WVeston-super-hiare, England, have invented new and useful Improvements in and Relating to Handllperated. Presses (on which application has been made. for Letters; Patent in Great Britain, No; 16,551,. dated 10th July, 1924:, and No. "(5,487, dated 19th March, 1925 of which the following is specification.

This. invention relates to hand operated toggle presses, more particularly those used for cuttingout and securing paper and other material to cardboard or the like, or for cfliecting embossed printing thereon.

According to this invention, in a hand operated press a hand lever is connected by a toggle to a plunger guided in a fixed part of the press frame and in the presser me1nher, so; that any out of balance thrust is transmitted to the plunger guides, and the plunger connected to said presser member by two stages of toggle mechanism in series. The platen is sli'dably' arranged on the top surface of the base plate, suitable stops be ing provided on the plateiror base plate to hold it in the position of use. This allows the platen to be slid inor out of position for placing the work Without the necessity for an extra top piece. v

. An embodiment of the invention is illustrated by way of example in the accompanying drawings.

igure 1 is. front view, half in section, on the line II of Figure 2.

Figure 2 is a side view in section on the line II-II of Figure 1, and

Figure 3 is a detail view in section on the line III-III of Figure 2. Y

The main frame of the machine comprises base plate 1 and cross beam 2 held spaced apart'for instance by pillars 3:. A presser member 4 is carried on guide rods 5 passing through the cross beam 2 and fitted with springs 6 which take up; backlash and play in the operating mechanism. The presser memberis operated by toggles comprising members 7, 8, abut-ting in grooves 9, 10 provided in abutment pieces 11, 12'respectively onthe cross beam 2' and the pressermember 4. The members 8 have rounded upper ends bearing in recesses in the members 7. The toggles 7, 8', are. operated by a horizontal toggle consisting of two members 18 oper ated by the downward movement of a plunger 14 which has anextension forming a guide for the presser member 4. The toggle members 13 have rounded ends which bear in grooves in the plunger 14 and in grooves in the members 7 which are formed with enlarged ends for this purpose. lever 15 having a forked end 16 embraces the upper end of the plunger 14, which is guided in a hole in the cross beam 2, a pivot 1'? connecting the lever and plunger. A boss 18 on the hand lever carries a pivot'19 con; nccting it with a pair of links 20 which are pivoted to the cross beam 2. By pulling down the lever 15 (in'a clockwise direction as seen in Figure 2) the plunger 14 is driven dmvnuuirds, while the provision of the links 2() permits the pivot 19 to move laterally as required by the path of the lever and plum per. The proportions of the parts are arranged so that at the very end of the stroke the pivot 17 is directly under the pivot 19. V In this position the parts form a species of toggle gear and the leverage ratio is extremely high. An adjustable counterweight 36 may be provided on the hand lever 15-this will retain the lever in the. upright position when the press is at rest andwill add to the operating force when the weight A hand i has passed beyond a position vertically over the pivot 17 on the downstroke of the hand lever. An adjustable stop consisting of a screw 35 may be provided which limits the forward extent of the lever stroke by coming into contact with the cross beam 2.

The platen 21 is arranged to be adjustable for height to suit different thicknesses of material to be operated upon, by arranging it sl'idably on inclined bearers 22 in-the base plate 1, the under face of the platen being inclined to correspond. The longitudinal position of the platen may be determined by adjustable stops, but preferably a screw 23 is used rotatedby a hand lever 24: or other suitable means, and passing through a threaded boss 25 on thep-l'aten. In order to render the platen removable,thescrew 23 is made hollow and a bolt 26 having a T-head 27', is carried within it. The T-head' 27 passes through a slot 28 in a plate 29 secured to or-integral with the base plate 1. A shoulder 30 is provided on the bolt which engages the outer face of the plate 29 and by turning the bolt 26 the T-piece 27 can be set across the slot 28 thus holding the platen in fixed longitudinal position. A handle 31 is provided for turning the bolt 26.

In the above described press two sets of toggle mechanism are shown arranged at opposite sides of the plunger 14;. Instead they may be arranged at the back and front longitudinally of the beam or in any other position. For example four sets may be used forming the sides of a. rectangle in plan view. 7

The provision of the springs 6 alone will cause the presser member 4 to rise when the lever 15 is raised and will keep the toggle parts together, but to prevent all risk of dis lodging the parts any convenient means can be provided to hold them together. For instance, the members 7, 8 and 18 may be provided with extensions forming pivots, which enter holes in links 32 or hearing plates 33 to hold them together. Any suitable means, such as split pins may be used to prevent the links 32 coming off endwise, or they may be secured by screws 34 to the members 7.

The construction of the toggles described above is given by way of example merely and may be modified in many ways. For in stance the top ends of the toggle members 13 may abut each other when they would roll on one another, thus obviating the friction between them. In such instances the plunger could be shaped to accommodate them appropriately above and below and could pass through a cut-out portion in them.

In some instances it may be found expedient to shape the presser plate so that itmay slide up and down on the four columns.

Any toggle member ends maybe so housed that they may abut together in a like manner to that described above and suitably housed rollers or roller bearings provided on beam and/or presser plate, or the toggle member ends for them to work on or in.

hat I claim is l. A hand operated toggle press comprising a frame, 1 a presser member guided therein, a plunger guided in said frame and in said presser member, a hand lever, and toggle gear connecting said hand lever and said plunger, and toggle gear connecting said plunger and said presser memberv A hand operated toggle press comprismg a frame, a presser member gu ded therein, a plunger guided in said frame and in said presser member, a hand lever, toggle gear connecting said hand lever and saidplunger and symmetrical toggle gear connecting'said plunger and said presser member; Y 3. A-hiand operated toggle press comprising a frame, a presser member guided therein, a plunger guided in said frame and in said presser member, a hand lever, toggle gear connecting said hand lever, and said plunger toggle gear connecting said plunger and said presser member, and an adjustable pressure receiving member in said frame.

4. A hand operated toggle press comprising a frame, a presser member guided therein, a plunger guided in said frame and in said presser member, a hand lever pivoted to said plunger, links pivoted to said frame and to said plunger, and toggle gear con necting said plunger and said presser men1- her.

5. A hand operated toggle press comprisi1 g a frame, a presser member guided therein, a plunger guided in said frame and in said presser member, a hand lever, a single stage of toggle mechanism connecting said hand lever and said plunger and two stages of toggle mechanism in series connecting said plunger and said presser member.

6. A hand operated toggle press comprismg a frame, a pressermember guided therein, a plunger guided in said frame and in said presser member, a hand lever, toggle gear connecting said hand lever and said plunger, toggles disposed symmetrically to said plunger between said presser member and said frame, and a toggle substantially perpendicular to said symmetrically arranged toggles having its knuckle joint formed in said plunger arranged substantially perpendicular to, and with its operating ends in engagement with the knuckle joints of said symmetrically arranged toggles.

7 A hand operated toggle press compris ving a frame, a presser member guided therein, a plunger guided in said frame and in said presser member, a hand lever pivoted to said plunger, links pivoted to said frame and to said plunger, toggles disposed symmetrically to said plunger between said presser member and said frame, and a toggle substantially perpendicular to said symmetrically arranged toggles having its knuckle joint formed in said plunger arranged substantially perpendicular to, and with its operating ends in engagement with the knuckle joints of said symmetrically arranged toggles.

8. A hand operated toggle press comprising a frame, a presser member guided therein, a plunger guided in said frame and in said presser member, a hand lever, toggle gear connecting said hand lever, and said plunger toggle gear connecting said plunger and said presser member, and a detachable pressure receiving member in said frame.

9. A hand operated toggle press comprising a frame, a presser member guided therein, a plunger guided in said frame and in said presser member. a hand lever, toggle gear connecting said hand lever and said plunger, toggle gear connecting said plunger and said presser member, inclined guides on said frame, a pressure receiving member slidable on said guides, and a screw for adjusting said pressure receiving member along said guides.

10. A hand operated toggle press comprising a frame, a presser member guided therein. a plunger guided in said Frame and in said presser member. a hand lever, toggle gear connecting said hand lever and said plunger, toggle gear connecting said plunger and said presser memhen and spring means tending to return said presser member to the commencement of the stroke.

11. A hand operated toggle press comprising a frame, guide rods Working in said frame, a presser member carried on'said guide rods, return springs on said guide rods, a plunger guided in said frame and in said presser member, a hand lever. and toggle gear connecting said hand lever and said plunger, and toggle gear connecting said plunger and said presser member.

In testimony whereof I have signed my name to this specification.

WILLIAM HENRY BRECKNELL. 

